Lawn sprinkler



K. J. KNUTH LAWN SPRINKLER May 2, 1933.

Filed June 15, 1932 KAI/U77! Gttornegs 315 klers are of the self sealing type, that is, i

f velvular "form Iwhich .precludeszthe admission 'Patented May 2, A1933 ppmatten med une 115,

' I'. This invention relates to rlawn rksprinkling systems :fandimore specifically .to an @improved vnozzle Lor sprinkling heedwadapted :forfllsev- I5- fInlawn sprinkling:systemsv of Athe f snhterraneafntype diiliculty hesbeenrexperienoedin lninintaining the .sprinkling Shewds in `opere-iA tiveorderwhenthegresstisfpermltted to grow of air after the water iis. turned off, fas -sueh "sprinkler heads .retain i water in the .conduits 'and thereby .cause considerablel .difficulty 1n f# 10 draining .the y,system in-*preparetion gfor E'the 'provide' u sprinkling; head fdapted lfor =use vin f a su'bterrne an sprinkling :system kwhioh will f W25 obviate I the difficulties heretofore `idesczrlbed and minimizevthejacostrozf maintenanc'eof such systems.'`yf f .30' for' bod-ily niovelnent I and penetrations thi-'oughi'and `above 'the .matted grass :or v other obstructions which tendtoimpedelthelopera- `tionof'th'e sp'ril'ikler.` Y

furtherobjectof the -invention .is'toon-V E35 ystruct a sprinkling gheaa which wine-be .ele-

v-ted, in lits *opere-tieve positionjabove the foliage foflthe surrounding shrubs or ,plants.-'

v Another object of the inventiongis to confstruet zt'siprinklinghead lia-vinga removable `outlet control jplugf inl the stern thereof 'so sbstitu'tefoutlets Vof variable `size may be 1 p employed .to effect the balancent the output of the sprinklerwth thek number of sprin- Another `object of .the invention is to2 Yprorvid,een.)sprinkler Iheed having `a` Astem portion constructed to; be extended -abovethe xesi-,righ

1 surface under the inuence ofthe Water. pres- Y i0 surewthmtlie system and which will fall y tterzaccumulates within .ofay

Y lretracted* orinoperative position.

',ofe modified form of the spray-nozzle *adnpted for inse iny conjunction with Ithe spraying head embodyingzthe present; invention.l

:sprinkling systein Acomprises a, gplurelityfof .oumuleting' chambers l1A Whieh are' vunited with the conduit .10:'by p'ipeTs orfelbows inl l '.1's2'. Serin No.)617,369;l i y n n yfbelowthe surface ofthe earth thew-ter I fis-turned ofi:`

1 Otherfobjectsmoreiorlessiancillary ofthev `foregoing and fthe Vmauinerin kwhichall; 4the l variousobj ectsjare realized :Willie-ppeerr in the'u following description which, considered in' 'f V.connection with `the accompanying drawing,`

sets forthv the invention.

preferre'dfenibodinient of the jInthedrzwving'-v-`v j y Y n y i 'Figure l"luisuvertical sectional View of `a;

V:unit ink I al lla-vvn sprinkling system including fthe sprinkler headenib'odyingthe present invention illustratedfiin its operative gposition.

'Figure 2 isy :avertica-l seCt-ion'al :View sim-ff larzto the illustrationin lfigure l Withffurther detail;zbeing shown :by the isectional: -view through-:the Ymedial axis of `the Ydevice/,the e sprinkler head wherein being shown in its Figure 3 ise ytransverse -sect-ional; #view `fta'kenupon 'a fplane indicated-by the VlineI 3-A-3 in Figure l. 1 p o i *"Fignrre .21: isa longitudinal sectionaly view Referring to ,the drawing the conduit l() i yalole fall or inclination toward thesupplfyw mein-andthe control `valve therefor, which, l

"ias is customrisprovided Withe-n air vent (to :effectizthe 'drainage :of the system; The

.spacedfverticavlly disposed stand pipes or ucl the usualina-nner,v vUpon ythe endfofl 'theac- Y oumulatng chamber 11 lthere is ka reduction vcoupling; l2 which retainsv a sleevejl?)l pro-W0 portioned to -extendwithin relatively short .distance fr'ointhe :earths sur-face. [l Within the" sleeve 13 theregis la -plungeror tubular stem `:14,the outer end thereof ,being provided with n. tip 15, conica-l inform :and drilled!!5 `rwithffa` plurali-ty of minute openings/spaced ,to provide `the 'suitable spread Aofthe spray- Q-ing jets;v

These outlets-are V@preferably-drilled `at divergent angles, lfor instance, the ltip @oaxelly drilled, ,at its Yenter endl wvlnlejflf the uppermost series 16' is disposed at an angle of 15, the centrally located series 17 at an angle of' 30 and the lower openings 18 arranged at an angle of 45 with the media-l axis of the tip.

The stem 14 is formed to slide freely with in the sleeve or casing 13 which is of adequate length to guide and support the stem when it is elevated or extended in its operative position. The innerportion .of the stem is provided with a plug 19 having a flange 2O slightly less in diameter than the bore of the accumulating chamber 11.` Upon the upper face of the flange there is Vawasher 21, preferably formed of rubber, and adaptedv for seated engagement with the end of the sleeve 13 which is extendedV within the chamber =ll to form a shoulder or valve seat 22. The inner face of the plug 19 is counterbored to receive a screen or wire gauze disc 23 which is provid-ed topreclude the admission of rust orother foreign matter through the aperture 24 and into the interior ofthe stem 14. Ad jacent the lower end of the accumulating chamber there is a pin 25 transversely disposed to the aXis of the chamber 11 and provided to support the stem 14 when the spray nozzle is retracted below the earthslsurface in its inoperative position.

A spray tip of an alternate form is shown in Figure 4. This structure embodies a plug 26 adapted toY be retained within the stem 14. The upper surface of the plug is formed with an angulated seat 27 which merges with a chamber 28 having a passageway 29 leading therefrom for communication with the interior of the stem 14. In the central portion of the plug there is a stud 30 upon the outer end of which .there is screwed a tip 31. Ad-

jacent the inner end of the tip there is a shoulder portion 32 formed to engage the valve seat 27 andthus form a baffle to effect 'a suitable spread of the water passing through the passageway 29 and the chamber .In operation when the valve controlling the flow of water through the conduit 10 yis opened the water pressure will impinge on the flanged plug 19 and cause the stem 14 to be driven upwardly until the washer 21 is seated upon the shoulder 22. The stem will be held thus elevated during the sprinkling operation due to the restricted outlet passage and the further restriction in the openings in the spray tip 15. Vhen the water is turned off and the pressure within the chamber 11 is released the stem will fall by grav ity upon the supporting pin 25.

By the provision of the aXial opening in the end of the spray tip a line stream of water will be emitted when the water pressure is applied even though thestem 14 fails to be elevated'beyond'the surface of the earth during the sprinkling operation. Such stream of water will indicate the position of the slprinkling head so that the unit may be readi y located and repaired.

The stem 14 and the members coordinated therewith may be proportioned so that the sprayer head when elevated by the application of the water pressure7 will accommodate the application of water upon the tops of the adjacent plants and shrubs. Obviously no structural modification in the sprinkler head need ,be made to accomplish this advantage save the Vmodification of the lineal d1- mensions of the stem and its appurtenances. The stem 14 may be keyed to the casing 13 to prevent the rotation thereof and the openings 16, 17 and 18 may be arranged within a limited circumferential portion ofthe tip when itis desired tov use the sprinkling head adjacent a sidewalk or some area which should be shielded from the spray.

Although the foregoingy description is necessarily of a detailed character, in order that the invention may be completely set forth, it is to be understood thatthe specific terminology is not intended to `be restrictive or confining, and that various rearrangements of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention as herein claimed.

lclaim: l l

l. In an underground sprinkling system a tubular riser having a reduced end section, a shoulder formed on the interior of the riser at the point of reduction, a tubular stem arranged for reciprocative movement `within the riser and guided in the said end section, a flanged plug mounted upon the lower end of said stem, the flange being of greaterdiameter than the end section, a gasket mounted upon said flanged portion of said plug and adapted( to provide sealingengagement with the said shoulder, a tip mounted uponthe end of the stern and tapered topierce vegetation adjacent the mouth of the riser, said tip being formed with a restricted opening there in, a cross pin in said riser to arrest the movement of the stem in its retracted position, said plug having an openingtherein for the admission of fluid within the stern, the said opening being so restricted as to cause the stem to be extended` when fiuidpressure is applied upon the face of the plug and to prevent the ready escapement of fluid within the stem when fluid pressure is relieved whereby the weight of the fluid entrappedwithin the stem will assist the retractive v movement of the stem. Y l

2. In an undergroundA sprinkling system a tubular riser having a reduced end section, a shoulder formed on the interior of the riser at the point of reduction, a tubular stem arranged for reciprocative movement within the riser land guided in the said end section, a fianged plug mounted upon the lower end of said stem, the fiange being of greater diameter than the end section, a. gasket mounti v ed upon said flan ed portion ofsa-id plug and kadapted t provide sealing engagement with.y the said shoulder, a tip mounted Aupon the end of the stem adjacent themouth of the riser, said tip being formed with La, restricted i opening therein, a Cross pin in said riser to arrest the movement. of the stem inlits retractedposition, said plug havin kan openf ing therein for the admission of uid within the stem, thesaid opening being so restricted 1 as to cause the stem tovbe extended when fluid pressure is applied upon the yface of the lug and to prevent the ready eseapement of uid n l Within the stem when fluid pressure is relieved wherebyV lthe weightl of the fluid entrapped Within the stemfkwill assist the retractive movementl of the stem.

In testimony whereof I' hereunto aflix my signature this 10th day of June, V1932.

KARLaJ. KNUTH. 

